I kind of like the factory infinity deck. The speakers sound good enough for me. I am not an audio nut. My 2010 has the alpine system with amp and subwoofer, roof speakers etc and I never turn it up loud enough to hear it.
I was hoping that I could use a port on the back, RCA or cd changer port and just put an adapter in the dash somewhere. I thought I read about one a while back but can't find it now...
If your Infinity has a socket on the back for a changer (mine didn't) all you need is the correct jack.
You can by kits with the jack that adapts down to a straight three connector plug like is used for the audio input on most computers.
I like to run my IPhone and MP3 off my factory Infinity system using a cassette adapter. Just push the cassette in and plug your device into the attached jack. It works great and requires no modification. Picked it up at Wally World for about $12.
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